Competition between direct and sequential two-neutron transfers in the $^{18}$O + $^{28}$Si collision at 84 MeV
Abstract
In this work we study the simultaneous and sequential two-neutron transfer mechanisms to the Si nucleus induced by (t,p) and (O, O) reactions. New experimental cross sections for the Si(O,O)Si reaction at 84 MeV are also presented. Direct reaction calculations are carried out within the Exact Finite Range Coupled Reaction Channel, for the simultaneous transfer of the two-neutron cluster, and the second order Distorted Wave Born Approximation, for the sequential transfer. Two different models are considered to describe the two-neutron cluster. The spectroscopic information was obtained from shell model calculation with {\it psdmod} interaction for the target overlaps where the 1p, 1p, 1d, 1d and 2s orbitals are included as valence sub-space. We show that simultaneous and sequential two-neutron transfer are competing mechanisms for the population of the ground state in Si. A systematic analysis of the two-neutron transfer induced by the () indicates that static deformation of target nuclei impacts on the two-neutron transfer mechanism.
Keywords
Cite
@article{arxiv.1811.10293,
title = {Competition between direct and sequential two-neutron transfers in the $^{18}$O + $^{28}$Si collision at 84 MeV},
author = {E. N. Cardozo and J. Lubian and R. Linares and F. Cappuzzello and D. Carbone and M. Cavallaro and J. L. Ferreira and A. Gargano and B. Paes and G. Santagati},
journal= {arXiv preprint arXiv:1811.10293},
year = {2018}
}